MySecretIslandGarden said: I have 3 topiary hibiscus. The oldest 2 are 6 years old and are in concrete urns in front of my Florida home. They have braided trunks. Since I keep them outside all year round I need to water them frequently throughout most of the year, except Nov. through Jan. Which is our "winter" here. I've found that every few months I need to trim to keep their shape and every few years I pull them out trim the roots and give them fresh soil. I fertilize with hibiscus fertilizer as needed.
Topiaries in general can be tricky, but I think they are well worth the effort. They need sun to bloom in my experience, so you must consider that. I hope this helps a little. I apologize for the pic, I tried to take it right now and the lighting isn't at a good time.
MySecretIslandGarden said: In the pic there are 2 different colors, so there was definitely some doctoring done by the grower. Since I'm in Florida and grow a variety of hibiscus I've had some different issues. If they have too much water or not enough water, like most plants, they are unhappy. The more sun and heat the more water they need. Since yours will be in a controlled environment, you'll have control over those aspects. But, indoor air will definitely pose a problem, so it will die without humidity. If it doesn't get enough sun you will have green leaves but no flowers. Pinching dead leaves and blooms is recommended because leaving them invites pests and the soil needs to be moist but not wet. Currently I have 15 different hibiscus, some that are well over 6 ft tall and I'm forever pruning them. I find the potted hibiscus much easier to manage. My 3 topiaries get a crew cut at least once a year to at least 6 inches smaller than I will let them grow to be and then frequently tweaking them. I have had hibiscus growing outside that I literally cut down to stems and they came back and grew to my roofline until I heavily pruned them back again. I realize I'm rambling a bit here. But these are things I learned while growing them.
I'm finding your experiment really interesting, so please keep me posted.
Whatsmyplant said: Thanks, I am unsure. I think it's Hibiscus syriacus.